The manufacturers claim that avanafil works faster than drugs like Levitra currently on the market.

The research team from University of Texas Health Science Centre has found that at high doses of the drug, almost 80 percent of sexual attempts resulted in erections good enough for intercourse.

Lead author Dr LeRoy Jones insists that the new drug will offer an alternative to men seeking "an improved experience".

"These data suggesting that avanafil achieves a full effect in 30 minutes or less, with a window of opportunity extending beyond six hours, would be a welcome option for ED treatment," CBS News quoted Jones as saying.

During the study, men received either an inactive placebo or avanafil at a dose of 50 milligrams, 100 milligrams, or 200 milligrams.

They found that 41 percent of men taking avanafil 50 milligrams reported successful intercourse, while 57 percent of men taking avanafil at 100 milligrams and 200 milligrams reported satisfaction.

Avanafil's most frequent side effect was headache, reported by 7 percent of men receiving the drug. Other common side effects included flushing and nasal congestion. (ANI)